Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75ada28acec6b4b…

MALICIOUS

PDF

44.8 KB Created: 2020-08-10 12:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f64c66b67c32bbb9fefa0eba4fb0f797 SHA-1: acf17111732a9bfb9bc3895cf6362fd02bbc24e8 SHA-256: f75ada28acec6b4b304b5e2f641cc23baf7869f557fb00a814bb77931770deba
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical redirector link to `https://ttraff.cc/pify?keyword=extrato+glicolico+barbatim%25C3%25A3o+pdf`, indicating a malicious intent to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external files, suggesting a broad distribution or SEO manipulation tactic. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=extrato+glicolico+barbatim%25C3%25A3o+pdf
    • http://files.jennifermoorehcpss.com/uploads/1/3/2/7/132740978/vivajudalixi-buridimanuxapel-lurijanufuv.pdf
    • http://files.victorychapel.net/uploads/1/3/2/6/132682974/kevene.pdf
    • http://files.myworldofadventure.com/uploads/1/3/0/9/130969472/bigibodafamawuw-fobafuxirore-danexidujutefam.pdf
    • http://rijamuzil.preacherrhetorica.com/uploads/1/3/0/7/130775448/latixapugoxim.pdf
    • http://files.nathanjonesmusic.com/uploads/1/3/1/3/131383247/zagopamafewo-xajid-rorufanofo-jitav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/vofofukibusizido.pdf
    • https://cdn.shopify.com/s/files/1/0429/2686/6599/files/carmilla_ita.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/delitos_contra_la_administracion_publica_libros.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/wopagesosefofulob.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/radelabilajirirobokesef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/84383155194.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/honey_app_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1032/files/xadopodifesumelire.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1046/files/rrb_allahabad_alp_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/60749716835.pdf
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/miniature_circuit_breaker_abb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000600c.bin
4ee696749ddfa0bdcffd7ff396b096b837f82bf0693c526a9f0b9238b03af8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 5344 bytes
font_01_sfnt_off000071a7.bin
353e16b3dde2e493d9f988abb431689cd697907fecd52dd9c0ab8156720076fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 10804 bytes
font_02_sfnt_off000095fe.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95FE 4324 bytes

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